Inter-call device for telephone sets



FIG. 1 is a front elevational view of a inter-call device for telephonesets showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a perspective view thereof;

The broken line showing of vertical lines on the keyboard in FIGS. 1 and7 is for illustrative purposes only and forms no part of the claimeddesign.

The ornamental design for a inter-call device for telephone sets,substantially as shown and described.